Speed of a boat in standing water is 9 kmph and the speed of the stream is 1.5 kmph. A man rows to a place at a distance of 105 km and comes back to the starting point. The total time taken by him is:
A. 16 hours
B. 18 hours
C. 20 hours
D. 24 hours
Answer: Option D
Solution (By Examveda Team)
Speed upstream = 7.5 kmphSpeed downstream = 10.5 kmph
∴ Total time taken
= $$\left( {\frac{{105}}{{7.5}} + \frac{{105}}{{10.5}}} \right)$$ hours
= 24 hours
This Question Belongs to Arithmetic Ability >> Boats And Streams
Join The Discussion